JPA TreeGrid new record

[bnr]

Hi.
I have a problem with the JPA. My goal is to use a Button to add new records to a data source. I use the SmartGWT EE JPA. This is my first code, which does not work.

If I remove the foreignKey from the tree_DataSource.DS.xml, then I can add a Record to the DataSource. But a tree without foreign key is not a tree in the view!

<DataSource
    ID="tree_DataSource"
    serverConstructor="com.isomorphic.jpa.JPADataSource"
    beanClassName="com.detection.smiths.eapcfg.server.persistence.Tree"
    >
    <fields>
        <field name="treeNodeId"     type="sequence" hidden="true"   primaryKey="true" />
        <field name="parentNodeID"   type="long" foreignKey="tree_DataSource.treeNodeId" title="pid" required="false"  rootValue="1" detail="false"/> 
        <field name="referenceNodeID"   type="long"     title="rTyp"    required="false"   />
        <field name="nodeTyp"   type="text"     title="Typ"    required="true"   />
        <field name="nodeName"   type="text"     title="Name"    required="true"   />
        <field name="wa"   type="text"     title="WA" required="true"   />
    </fields>
</DataSource>

package com.detection.smiths.eapcfg.server.persistence;

import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table (name="Tree")
public class Tree
    implements Serializable
{

    @Id
    @Column (nullable = false)
    @GeneratedValue (strategy = GenerationType.IDENTITY)
    private Long treeNodeId;

    @Column (nullable = false)
    private String nodeName;

    @Column (nullable = false)
    private String wa;

    @Column (nullable = false)
    private String nodeTyp;

    @Column (nullable = false)
    private Long parentNodeID;

    @Column (nullable = false)
    private Long referenceNodeID;

    public Tree ()
    {
    }


    /**
     * Returns a string representation of the object. Resulting string contains
     * full name of the class and list of its properties and their values.
     *
     * @return <code>String</code> representation of this object.
     */
    @Override
    public String toString ()
    {
        return getClass().getName()
               + "["
               + "treeNodeId=" + ((getTreeNodeId() == null) ? "null" : getTreeNodeId().toString())
               + ", "
               + "parentNodeID=" + ((getParentNodeID() == null) ? "null" : getParentNodeID().toString())
               + ", "
               + "referenceNodeID=" + ((getReferenceNodeID() == null) ? "null" : getReferenceNodeID().toString())
               + ", "
               + "nodeTyp=" + ((getNodeTyp() == null) ? "null" : getNodeTyp().toString())
               + ", "
               + "nodeName=" + ((getNodeName() == null) ? "null" : getNodeName().toString())
               + ", "
               + "wa=" + ((getWa() == null) ? "null" : getWa().toString())
               + "]";
    }

	public Long getTreeNodeId() {
		return treeNodeId;
	}

	public void setTreeNodeId(Long treeNodeId) {
		this.treeNodeId = treeNodeId;
	}


	public String getNodeName() {
		return nodeName;
	}


	public void setNodeName(String nodeName) {
		this.nodeName = nodeName;
	}


	public String getWa() {
		return wa;
	}


	public void setWa(String wa) {
		this.wa = wa;
	}


	public String getNodeTyp() {
		return nodeTyp;
	}


	public void setNodeTyp(String nodeTyp) {
		this.nodeTyp = nodeTyp;
	}


	public Long getParentNodeID() {
		return parentNodeID;
	}


	public void setParentNodeID(Long parentNodeID) {
		this.parentNodeID = parentNodeID;
	}


	public Long getReferenceNodeID() {
		return referenceNodeID;
	}


	public void setReferenceNodeID(Long referenceNodeID) {
		this.referenceNodeID = referenceNodeID;
	}

}

	final DataSource treeDS = DataSource.get("tree_DataSource");

        IButton addButton = new IButton("add record");
        addButton.addClickHandler(new ClickHandler()
        {
            public void onClick (ClickEvent event)
            {
            	Record r=new Record();
            	r.setAttribute("nodeName", "DE");
            	r.setAttribute("parentNodeID", 1);
            	r.setAttribute("referenceNodeID", 1);
            	r.setAttribute("nodeTyp", "ABC");
            	r.setAttribute("wa", "new WA");
            	treeDS.addData(r);
            	
            }
        });

 <persistence-unit name="ds" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
      ....
    <class>com.detection.smiths.eapcfg.server.persistence.Tree</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>
    <properties>
      <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect"/>
      <property name="hibernate.hbm2ddl.auto" value="create-drop" />
       ...
    </properties>
  </persistence-unit>

[alius]

Hi,

First: there is no type="long" - use type="integer".

Now to relations:
To make JPA relations work you have to define relation at JPA level (in your entity declaration):

// Replace these lines
//    @Column (nullable = false)
//    private Long parentNodeID;
// with
    @ManyToOne
    @JoinColumn(name="parentNodeID", referencedColumnName="treeNodeId")
    private Tree parentNodeID;

Update getter/setter type from Long to Tree as well.

Regards,
Alius